77311-818-04LF

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Rectangular Connectors - Headers, Male Pins, commonly used in electronic assemblies, have a wide range of applications and are usually used when an electrical connection is needed. The two most popular rectangular connector product series, 7731 and 783, are widely used in consumer, telecom, industrial, and automotive markets. The 7731-818-04LF is a specific part of this product family, and understanding its application field and working principle is important when specifying a suitable connector for a particular project.

The 7731-818-04LF is a 4-pin, surface-mount, dual-row header assembly containing two rows of pins parallel to each other. This header features a right-angle orientation, with pins facing up. It has a straight mating profile and has an overall length of 7.62mm (.300"), with a pitch of 1.25mm (.048"). Its current rating is 2.3A (AC/DC), and it has an operating temperature range of -55°C to 125°C. Additionally, this header has a maximum voltage rating of 28V (DC) and a contact resistance of 30mΩ max.

The 7731-818-04LF is designed to provide a reliable electrical connection between a PCB (printed circuit board) and surface mount components. Its four solderable eyelets provide a permanent connection to the PCB, while the contacts provide a secure reliable connection to the mating components. This connector is often used for applications requiring the mating of components such as switches, sensors, and ICs on the circuit board. This header is widely used in consumer and telecom applications, such as mobile phones, digital cameras, and routers.

The 7731-818-04LF’s working principle is based on the concept of electrical connection. This header is equipped with four eyelets that are attached to the PCB and connected to the power supply, forming the circuit path. Then, the header pins are inserted into the mating components and soldered to the board, forming the electrical connection. This creates a secure and reliable connection, ensuring that current flows in the correct direction and without interruption.

In conclusion, the 7731-818-04LF is a 4-pin, surface-mount, dual-row header assembly widely used in consumer and telecom applications for providing a secure and reliable electrical connection between a PCB and surface mount components. This header features a right-angle orientation, has a straight mating profile, and is rated for a maximum voltage rating of 28V (DC). Additionally, it has an operating temperature range of -55°C to 125°C and a contact resistance of 30mΩ max.

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